Hypodermic syringe with non-turning tip connector



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HYPODERMIC ,ISYRINGE WITH NON-TURNING TIP CONNECTOR Filed Deo. 30. 1966 4 Sheets-Sheet 2 Vo MU 7 A a2 R s G /W O O 7 f//s a. f////////////m\ws u sod lNVENTOR RAUL OLVERA ARC E Emi-wmf ATTORNEY 4 Sheets-Sheet 5 y R. ARCE HYPODERMIC SYRINGE'WITH NON-TURNING TIP CONNECTOR Jain. 27,'j197o Filed Deo. 30, 1966 lNVENToR. RAUL OLVERA ARCE BY W ATTORNEY R. O. ARCE Jam'. 27, 1970 HYPODERMIC SYRINGE WITH NON-TURNING TIP C ONNECTOR 4 Sheets-Sheet 4 Filed DGO. 30. 1966 VIII,

INVENTOR RAULOLVERA ARCE BY Mmm/Ll @QJJLM/Q ATTORNEY United States Patent O 3,491,757 HYPODERMIC SYRINGE WITH NON-TURNING TIP CONNECTOR Raul Olvera Arce, Cordobanes 25, Mexico City 19, Mexico Filed Dec. 30, 1966, Ser. No. 606,062 Int. Cl. A61m 5/32 U.S. Cl. 128-221 3 Claims ABSTRACT F THE DISCLOSURE A transparent disposable plastic hypodermic syringe with a tip connector for reception and retention of the hypodermic needle in a non-turning and airtight relationship with the fluid containing cylinder of the syringe.

This invention relates in general to hypodermic syringes and specifically to improvements therein whereas the present day type of hypodermic syringe with the Leur-Lok has many disadvantages which my invention overcomes.

The Leur-Lok arrangement, as it is used today with its positive reception of the injection needle does have the advantage of providing positive gripping of the needle as well as positive sealing against leaks which may cause air to enter the syringe, this entrance of air, above all things, being dangerous in the proper use of the hypodermic syringe.

Although the physical arrangement of the Leur-Lok type of hypodermic syringe is its prime advantage the specific material from which it is made has 'been the prime factor or in its high cost. The cylinder is generally made of glass as is the plunger and the actual Leur-Lok attachment is made of chromed brass which is subject to corrosion, diiculties in cleaning and sterilizing and other deleterious factors. Its opacity and very form makes it difficult to clean and impossible to determine whether it is absolutely clean before reuse.

It is the primary object of my invention, therefore, to produce a hypodermic syringe in which all the parts are transparent, other than the actual needle itself, which forms no part of my invention, whereby the form of the various parts and their transparency not only makes cleaning and antisepticizing easy :and positive but the cost of manufacturing is considerably reduced as certain parts can be molded from plastic in a very simple and inexpensive manner and yet with a precision completely adequate for the intended purpose and having the advantage of being disposible if necessary With little or no attendant loss because of the low cost. They may be used with present day glass cylinders or with plastic cylinders.

Another object of my invention is to provide a tip connection for reception of the needle in which said tip connection has a positive non-turning and airtight connection with the cylinder.

One other object of my invention is to provide dual-purpose and convertible tips which may be used either with the Leur-Lok type of needle or as a free pivot type connection where the needle, tubing or other element is slipped onto a tapered nozzle of the syringe without being locked thereon.

Other objects and advantages as well as the construction and manner of use of the various forms of my invention will be apparent from the following specification in connection with the accompanying drawings in which:

FIG. 1 is a perspective view of a hypodermic syringe constructed in accordance with my invention covered in now abandoned application for U.S. patent Ser. No. 578,- 816, tiled Sept. 12, 1966, with the integral Leur-Lok tip and movable plunger.

ice.

FIGS. la and lb are a cross sectional view and a fragmentary perspective view of one form of hypodermic syringe tip connection in which the cylinder is provided with short slots to engage projecting ribs in the Leur- Lok type element for positive and nonturning connection therewith.

FIGS. 2a and 2b are similar views in which the ribs land slots are reversed with the Leur-Lok element having full length slots to receive ribs running the full length of the syringe tip.

FIGS. 3a and 3b are similar views with both elements having single planar partial contacting portions to prevent turning.

FIGS. 4a and 4b are similar views with double opposed partial planar contacting surfaces.

FIGS. 5a and 5b are similar views with a full single planar contacting surface on each element and a sealing element between the cylinder tip and the Leur-Lok type element.

FIGS. 6a and 6b are similar views with full double at contacting surfaces and the sealing element.

FIGS. 7a and 7b are similar views with a plurality of projections on the glass cylinder extension adapted to snap into position in matching depressions in the Leur- Lok type element.

FIGS. 8a and 8b show another form of glass projection used similarly to FIGS. 7a and 7b.

FIGS. 9a and 9b illustrate a bayonet type connection between the cylinder and the Leur-Lok type fitting.

FIGS. 10a and 10b illustrate a plurality of ribs and slots between the cylinder tip and Leur-Lok type fitting.

FIGS. lla and 11b illustrate the use of a surrounding gasket or seal between the cylinder tip and the Leur- Lok Vtype fitting to be used in the event the dimensions of the glass tip are not perfect.

FIGS. 12a and 12b illustrate a dual member Leur- Lok in which the cylinder member receives a snap fit plastic nonrotat-able sealing tip thereon, which in turn receives a snap fit needle receiving member with the lugs received in recesses in the sealing tip to prevent turning therebetween.

FIGS. 13a and 13b illustrate an arrangement similar to FIGS. 12a and 12b wherein opposite inclined shoulders provide for reception in fixed position of the hypodermic needle.

FIGS. 14a and 14b illustrate another form of the invention in which a cylindrical shaped outer snap-fit member is received on the glass cylinder which has its own internal needle engaging free pivot tip, the outer member snap fitting with the free pivot tip, and ribs and slots being used between said member and tip, thus preventing turning.

FIGS. 15a and 15b are similar views in which projections and indentations are used between the cylinder and the snap fit member With a spiral rib receiving the needle.

FIGS. 16a and 16b illustrate another form of the invention in which the glass cylinder foreshortened tip receives a snap lit internal member projecting into the needle which engages the outer cylindrically shaped member, snap fitting onto the internal member, suitable lugs and apertures being provided between various members to prevent rotation therebetween.

FIGS. 17a and l7b illustrate a form of my invention similar to FIGS. 14a and 14b wherein one or more lugs and recesses may be provided at the snap fit annulus between an outer cylindrical member and the glass cylinder tip.

FIGS. 18a and l8b illustrate still another form of the invention in which the glass cylinder receives a short snap fit cylindrical member which in turn receives another short snap lit member in the form of a Leur-Lok and also having a free pivot central needle engaging tip and spiral needle receiver, suitable lugs and recesses being provided between the glass cylinder and the first short cylindrical member, and a sealing member being received between the irst short cylindrical member and the second snap lit member.

FIGS. 19a and 19b illustrate the glass cylindrical member receiving a projecting snap t cylinder with lugs and recesses therebetween to prevent turning, said projecting cylinder having a spiral rib for reception of the neeedle, and an internal projecting member to contact the needle and snap fitting internally with the projecting cylinder, planar surfaces therebetween preventing turning and a gasket between the end of the glass cylinder and the internal projecting member to form a seal therebetween.

FIGS. 20a and 2Gb illustrate another form of my invention showing a Leu-Lok type fitting similar to FIGS. 9a and 9b, with opposed slots to provide more flexibility to the tip for application to the cylinder.

FIGS. 21a and 2lb illustrate still another form of my invention in which the Leur-Lok connection is eliminated but which retains the opposed slots for additional elasticity.

In the various forms shown in the drawings I have endeavored to illustrate a number of different configurations possible in which the principles of my invention are incorporated. It must be kept in mind that the cylinder can be made of glass or plastic although glass may be preferable for its ease in cleaning and its clarity as Well as its inherent characteristic of maintaining its form regardless of the heat of the sterilizing medium.

With the use of my invention the problem of breakage is minimized as the application of the needle to the cylinder is through an intermediate nonbreakable material.

In some cases of application of an intermediate member to the tip of the cylinder it is essential that there be no rotative movement between the two elements and therefore various means have been shown in the modications of the intermediate member or members to prevent rotative relation with the cylinder.

Referring now to the drawings by numerals of reference in FIG. 1 where I have illustrated the syringe 10 as shown in my application Ser. No. 578,816, with its cylinder 11 and plunger 12 Iboth being made of a suitable plastic material, the cylinder having its needle receiving tip 13 with central apertured tapered nozzle 14 and outer cylindrically shaped needle receiving socket 15 having spiral securing ribs 15 internally thereof.

In FIGS. la and lb, the cylinder 11 may be formed with a reduced tip 16 having an annular recess 17 at the juncture of the tip with the cylinder, the tip prefer-ably being tapered as at 18 and in this particular form having oppositely disposed slots 19, the use of which will be explained hereinafter, said slots extending only partially the length of the tip 16.

The intermediate Leur-Lok type needle receptor 20 in FIG. la has a substantially cylindrical outer configuration or surface 21 with opposing internal recesses 22 and 23, one recess 22 having inturned lip 24 adapted to snap t into the annular recess 17 between the tip 16 and cylinder 11, the recess 22 being a substantially precise fit with said tip 16. The receptor 20 is provided with opposing ribs 25 internally of recess 22 adapted to register with the oppositely disposed slots 19 and thereby prevent rotative movement of the receptor 20 when mounted on the tip 16.

The end of the tip 16 may be provided with a projection 26 adapted to fit a matching recess 27 in the receptor 20 aiding in the sealing relation 'between the two at the junction of the central aperture 28 of the tip 16 and the central aperture 29v of the receptor 20.

The end of the receptor 20 remote from the syringe cylinder 11 has an elongated tapered nozzle 14 extending through the recess 23 and internally of said recess 23 are spiral securing ribs 16 in substantially the Same form as now in use for the Leur-Lok system.

In the modification shown in FIGS 2a and 2b the slots 19 and ribs 25', are reversed and are of full length of the reduced syringe tip 16 and internal recess 22.

In the form of my inventions shown in FIGS. 3a and 3b, rotative movement between the tip 16 and needle receptor 20 is prevented by the partial flat surface 30 on the tip 16 bearing against flat surface 31 of the internal recess 22 of the needle receptor 20.

In FIGS. 4a and 4b my invention shows a modification in which opposing partial at surfaces 30 on the tip 16 are used to engage opposite partial flat surfaces 31' in the recess 22 of the needle receptor 20 to prevent turning relation between the tip and receptor.

In FIGS. 5a and 5 b the modification shows a full planar single surface 30 on tip 16 in contacting relation with full planar single surface 31" internally of the recess 22 of needle receptor 20, thus preventing turning relation therebetween. A resilient sealing member 32 is used at the end of tip 16 between said tip and the end portion 22 of the recess 22.

FIGS. 6a and 6b show double in full planar surfaces 30d and the sealing member 32 as in FIGS. 5a and 5b, the interior of the recess 22 also having double flat surfaces 31d.

FIGS. 7a and 7b illustrate the use of projections 33 on the tip 16 to engage matching identations 33 in the internal surface of recess 22.

In FIGS. 8a and 8b are illustrated a tip 16 with lateral projections 34 adapted to engage lateral recesses 34 in the internal surface of recess 22.

FIGS. 9a and 9b show a bayonet type connection 35 between the tip 16 and the needle receptor 20, the projection 35 riding in the recess 35" of the tip 16.

FIGS. lO'a and 10b show a plurality of slots 36 in the tip 16 adapted to receive a plurality of registering ribs 36 extending internally from the wall of the needle receptor 20 into recess 22.

In all of the forms described in FIGS. la to 10b, the inturned lip 24 snaps into place in annular recess 17 making for a tight t between the tip and the needle receptor 20, and each of the forms employs means for preventing turning relation between the tip and the receptor. Thus, the Leur-Lok type needle can be securely applied to the needle receptor 20 without turning of said receptor.

In FIGS. 11a and 11b the inturned lip 24 of the needle receptor 20 engages the annular recess 17, there being a rotation restricting means in the form of a stop member 45 on the reduced tip 16 engaging a recess 46 in the needle receptor. There is also provided between said needle receptor 20 and the reduced tip 16 an annular sealing member 37 of a suitable material whereby anv imperfections in the glass reduced tip 16 will not yaffect the seal between said tip and the needle receptor 20.

In FIGS. 12a and 12b, a two-piece needle receiving tip is illustrated with the needle receptor 20 having the same form of elongated tapered nozzle 14 as shown in the previous figures, the receptor 20 having associated therewith the separate Leur-Lok type collar 38 with annular rib 39 receivable in annular groove 40 in the receptor 20, a plurality of lugs 41 being received in recesses 42 to prevent rotation between the collar 38 and the upper portion 20 of the receptor 20. Helical rib 43 is adapted to receive the hypodermic needle which moves thereupon into sealing position.

FIGS. 13a and 13b show the same general structure as FIGS. 12a and 12b except that inclined planar surfaces 44 are used for reception of the Needle N.

FIGS. 14a and 14b show a needle receptor 20 in which the tapered nozzle 14 is actually an extension of the reduced tip 16, a plurality of ribs 25 internally of the needle receptor 20 being adapted to engage matching recesses 19 in the reduced tip 16', inclined planar surfaces 44 being employed in the same manner as in FIGS. 13a and 13b.

FIGS. 15a and 15b show the same general idea with glass projections 33 on the reduced tip 16 being adapted to engage recesses 33 on the interior surface of the needle receptor 20, and helical ribs 43 receiving the needle.

In FIGS. 16a and 16b, I have illustrated still another form of my invention where an annular recess 17 is provided between the reduced tip 16 and the cylinder 11 of the hypodermic syringe, the recess 17 being interrupted by a stop member 4S. An elongated tapered nozzle member 14 with its upper portion 13 having inturned lip 24 snap lits into place in the annular recess 17 around the reduced tip 16 with a recess 46 enga-ging the stop member 45 to prevent rotation. At the point of contact between the inturned lip 24 and the reduced tip 16 is an outer annular recess 47 which receives the inturned lip 48 of the needle receptor of the Leur-Lok type, a stop member 45 engaging the recess 46' to prevent rotation.

FIGS. 17a and 17b illustrate a type of needle receptor as shown in FIGS. 14a and 14b with the reduced tip 16 and tapered nozzle 14, the stop member 45 preventing rotation of the needle receptor. The inclined planar surfaces 44 as shown in FIGS. 13a and 13b are used for moving the needle into sealing position.

FIGS. 18a and l8b again show the two piece arrangement as in FIGS. 12a and 12b and 13a and 13b, the reduced tip 16 being cylindrically shaped and having the annular rib 24 received in the annular groove 17, interrupted by stop member 45 preventing rotation of an intermediate member 20', having the annular recess 51 adjacent one end and externally thereof, receiving the lip 52 of the Leur-Lok type `collar 38, a sealing member 22 being received between the end of the reduced tip 16 and the adjacent surface of the needle carrying collar 38.

FIGS. 19a and 19b also show a two piece arrangement but in this instance the outer cylindrical portion or needle receptor 20 snap ts in the annular recess 17 by means of annular rib 24, a stop member 45 preventing rotation. The elongated tapered nozzle 14 is internally received by the receptor 20, the annular rib 55 snapping into position in annulad recess 56, with a sealing member 22' lbetween the reduced tip 16 and the nozzle or tip 14.

FIGS. 20a and 20b illustrate another modication in which one or more slots 57 may be provided to give more elasticity to the needle receptor 20 to facilitate its application to the annular recess 17. The slots 57 may be -used in any of the forms shown in the drawings.

FIGS. 21a and 2lb show the use of the same type of slot 57 in a form of the invention which eliminates the Leur-Lok connection and employs only the tapered receptor 14 for a needle, tubing or the like, this being what is termed the free-pivot type of connection.

While I have shown numerous different variations of my invention I do not wish to be limited to the specific modifications shown as other forms may be employed without departing from the spirit of my invention.

I have provided various forms of inexpensively made units adaptable for both use with the Leur-Lo type needles and for free-pivot use for needles, tubing or any other device attach-able to a hypodermic syringe. The very fact that my invention may be made from the new plastic materials and still retain precision control of critical tolerances in design and manufacture Iwithout impairing the eiciency of the hypodermic syringe makes it a definite advancement over the devices now existent inthe art. The further great advantage is that units can be sold for either free pivot use or for Leur-Lok use, or in combination for either of the two u ses resulting in a considerable saving in cost of hypodermic syringes.

What I claim as new and desire to secure by Letters Patent is:

1. In a hypodermic syringe employing a fluid receiving cylinder, a reduced-projecting portion extending from one end of the cylinder, an annular recess on the reduced projecting portion adjacent said one end of the cylinder, a tip adapted to receive a removable needle sealingly carried by the cylinder, said vtip including an annular portion receivable by said annular recess, rotation preventing means between the cylinder and the tip which include registering portions therebetween rendering one rotativiely immovable with respect to the other, the projecting portion including an extended freepivot connection for devices connected to the syringe, the tip including the Leur-Lok connection for the needle.

2. The structure as specified in claim 1, the free-pivot connection for devices connected to the syringe lbeing carried internally of the tip, and a sealing element between the free-pivot connection and the projecting por, tion of the fluid receiving cylinder.

3. The structure as specified in claim 1, the projecting portion carrying a free-pivot connection for devices connectable to the syringe, the tip being received in nonrotatable relation about the free-pivot connection and having a Leur-Lok connection for the needle.

References Cited UNITED STATES PATENTS 2,834,346 5/195-8 Adams. 2,158,593 5/1939 Scrimgeour 128-221 2,711,171 `6/1955 Dunnican. 2,755,801 7/1956 Morando 128-221 2,902,995 9/ 1959 Loer. 3,048,172 8/ 1962 Krueger.

FOREIGN PATENTS 1,03 6,042 4/ 1953 France.

RICHARD A. GAUDET, Primary Examiner MARTIN F. MAJESTIC, Assistant Examiner 

